Hydraulic air-compressing pump



(No Model.) E. H. WEATHERHBAD. HYDRAULIC AIR COMPRESSING PUMP. No. 603,242. Patented Apr.'26, l1898.

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UNITED STATES i PATENT OFFICE.'

EIDWARD H. WEATHERHEAD, OF CLEVELAND, OHIO.

HYDRAULLIC AIR-COMPRESSING PUIVI'P.

SPECIFICATION forming part of Letters Patent No. 603,242, `dated vApril 26, 1898.

Application filed April l1, 1896. Serial No. 587,091. (No model.)

To @ZZ whom it may concern,.-

Beit known that I, EDWARD H. WEATHER- HEAD, a citizen of the United States, residing at Cleveland, in the county of'Ouyahoga and State of Ohio, have invented certain new and useful Improvements in Hydraulic Air-Compressing Pumps; and I do hereby declare that the. following is a full, clear, and exact description of the invention, which will enable others skilled in the art to'which it appertains to make and use the same.

My invention relates to hydraulic air-compressing pumps; andl the invention consists in a pump constructed and operating substantially as shownrand described, and particularly pointed outin the claims.

In the accompanying drawings, Figure l is a vertical sectional elevation showing the parts in starting position with the Weighted piston in its lowest position on the downstroke. Fig. 2 is a vertical sectional elevation showing the parts as they appear at the end of the upstroke and ready to return.A

A represents the base of the pump, and B the cylinder supported thereon and accommodating the piston O. The base Amay be made in as many parts as convenience of construction shall suggest, and the cylinder B is secured therein at its top. The piston O is packed at 2' to be water-tight in all its movements, and the cylinder is long enough to afford'the requisite room in its top above the piston to get the desired compression of the atmosphere both in j volume and density.. If a different construction of piston and chamber therefor were used, as there might be, the function and purpose of the pump would still be subserved, and henceI do not limit myself to the special style of piston and chamberhere shown, these being subject .toY many modifications that would -work'equally well with theother parts;

but, as shown, the piston has a tubular space 3 internally nearly its-full length adapted to accommodate the valve-actuating rod E. .The base A has an internal chamber open at its top to the piston O, and the pressure fluid enters this chamber through inlet-port 4 and is discharged therefromnthrough outlet or exhaust port 5. However, intermediate of said internal pressure-chamber and said ports is certain mechanism comprising a barrelshaped or tubular valve G of such length as to extend from saidinternal chamber. F at its top into the exhaust-'port 5 below. This causes the valve to vtraverse or pass bodily through the inlet-port 4 at its inner portion, thereby exposing the valve all around its side, and packing 7 and 8 is introduced about the valve both above and below the inlet-port. The inlet-port is constantly open to the pressure in the service-pipe, and hence this packing is required.

The valve G has two working positions, as shown in Figs. 1 and 2. Thus when the piston C is at the bottom of its stroke the valve G is down on the bottom pad 10, thus closing the passage of water outward through the valve that way. It will also be noticed that the valve has two seriesv of circularly-arranged perforations 11 and 12 near its top and that when the valve is down the-packing 7 comes between these perforations. I Now the valve being hollow the pressure fluid will of course flow into the pressure-chamber F, entering the valve through holes; 11 and discharging into the chamber through holes 12. The chamber F being thus subjected to pressure will fill with water and 'drive piston O upward until at last the plunger part thereof reaches the top of the Acylinder B. Before this occurs the nut `14E on the rod E will be engaged in the bottom of the piston at 15 and the rod E will be `drawn upward until its head 16 engages the top of valvefG. Then as the piston continues to ascend the valve G will be drawn upward such distance as to take it from what is its closed position, Fig. 1, to its open position, Fig. 2. This movement of the valve is comparatively slight, yet sufficient for all purposes, and the upward movement of the valve is limited by the collar 18 thereon just below inlet-holes 11. This 'collar is drawn up against packing 7, which closes the pressure chamber F entirely off from the pressure or service pipe and, lifting the valve from the packing-pad lO in the bottom of base A, establishes an exhaust from chamber F through holes 12, and possibly more or less y through holes 11, and out through the valve andexhaust-port 5. In these movements of ICO place through rod E. Hence I have employed the spring-pressed toggle bars or rods Il, pivoted at one end on a collar 20, rigid with rod E, and at the other end supported in trunnioned blocks L on posts 21 in the base A and shown here as formed integral therewith. The blocks L have holes through them for the free passage of rods H, and springs 22, encircling the rods, bear against these blocks and the flange 23 at the other end of rod H. The posts 2l have bearings at their tops, open at their front to insert the trunnions of blocks L, and said blocks are held there by the springs 22. Now in the upward movement of the rod E and valve G the rods H will slide back in the blocks L as much as they need to until they reach a horizontal position. Then they will begin to move forward again, and just as soon as a little inclina-tion is obtained the springs will assert themselves and help lift the rod E and will hold the valve-collar 1S against its seat on the packing 7. The valve G is now open and the water discharges rapidly from beneath piston C. The valve remains in this position until the piston C descends and strikes the collar 2O and carries it down past the dead-center point. As soon as this occurs the springs 22 will force the said collar and the valve-stem E, to which it is attached, downward, and this will carry the valve G down again to place, as in Fig l. So it will be seen that valve-rod E serves under certain conditions to raise valve G from closed to open position, the latter position appearing in Fig. 2, and the collar 20 serves to press the valve down to closed position. The valve thus becomes part of the waterway both as it enters into the pump for power purposes and to exhaust the water therefrom after use, and the openings l2 purposely are made large, so that the exhaust may be rapid.

Obviously the spring mechanism for changing the position of the valve might be differently located and other changes and modications might be made and still have the equivalent of what is shown in function and result. It will be noticed, however, that the valve is not provided with a piston and that there is but a single piston in the entire structure.

At the top of the cylinder B is a valved inlet-passage 30 and a valved outlet-passage 31, and the valve 32 for passage 30 has an arm which is engaged by the piston C when it reaches the limit of its upstroke and admits air above the piston to facilitate the return of the piston as the water recedes from beneath.

Having described certain valve mechanism herein, it is of course understood that this may be modified, so as to use the equivalent thereof in function and result, the piston-connecting rod serving to operate such mechanism, as it does the valve here shown.

The moment that the parts are carried to the position shown in Fig. l, which occurs by changing the valve from its raised to its lowered position, the descent of the piston must stop, because now the exhaust is closed and the pressure-port is opened. Hence no mechanical stop is required beneath the piston.

lVhat I claim as new, and desire to secure by Letters Patent, is-

l. The combination with the base having inlet and outlet ports, the air-compressing chamber and the piston in said chamber, in combination with a combined inlet and outlet valve constructed to open one of said ports at a time and at the same time to close the other port, and mechanism between said piston and valve to actuate the valve, said mechanism comprising a rod loosely connected with said valve and piston, respectively, and spring-actuated mechanism located in the said base and engaging said rod to facilitate the action of the valve at the ends of its strokes, substantially as described.

2. The combination with the base and the piston cylinder and the piston therein, of valve mechanism in the base to control the ow of iuid to and from the pump, a rod connecting said valve mechanism and piston, spring-pressed rods pivotally connected to said rod and supports in which said springpressed rods are adapted to slide,substantially as described.

3. The easing havingafluid-pressure chamber and inlet and exhaust ports on diiferent horizontal planes, and a perforated hollow valve between said ports and chamber, in combination with the piston, the valve-actuating rod entering said piston and said valve, and the spring-pressed rods connected with said rod above the valve, the said valve having packing about its side above and below the inlet-port and constructed to seat on the bottom of the base, substantially as described.

lVitness my hand to the foregoing specification on this 24th day of March, 1896.

EDXVARD H. VVEATHERHEAD. lVitnesses:

H. T. FISHER,

R. B. MOSER.

IOO 

